Spot gluer for box-making machines



Feb. 17, 1931. H. J. (5085 1,793,082

SPOT GLUER FOR BOX MAKING MACHINES Filed Oct. 1:. 1929 I "-1 29 W of m 3 14 r 'i Z1 i E 2'2 l l L g; 20 l '37 l I I l I l l 2f- 3 @5 a: f

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. I77U677t02 HaqroZd'J. 6 063 'wheels or disks.

Patented Feb. 17, 1931 UNITED STATES PATENT OFFICE HAROLD J. GOSS, 0F NASHUA, NEW HAMPSHIRE, ASSIGNOB TO THE INTERNATTONAL PAPER BOX MACHINE COMPANY, OF NASHUA, NEW HAMPSHIRE, A CORPORA- TION OF MAINE SPOT GLUER FOR IBQX-MAKING MACHINES I Application filed October 1, 1929. Serial No. 396,449.

and predetermined areas of the blanks, and' heretofore one common practice has been to apply the glue while the blanks are stationary. If the blanks are being supplied to the folding mechanism by means such as endless belts, it has been customary to temporarily arrest the blanks and employ suitable pads or other devices to apply the glue to the selected members or portions of the blanks. Ihis necessarily interferes with the rapidity of operation of the folding machine.

Another common practice has been to employ wheels or disks which rotate with their lower portions in glue, employing with such wheels or disks means for deflecting or diverting some portions of the blanks which are fed past the wheels or disks, so that glue will be applied only to other portions of the blanks that ride in contact with the gluing This last mentioned procedure necessitates mechanism to effect the deflection. And for some types of boxes it is incapable of effecting accurate location of the areas of the blanks which receive glue thereon. Of course it is to be understood that the word glue is employed herein merely as a generic term for any adhesive making of paper boxes, without liability of some of the glue being extended onto other portions.

of the blanks to which the glue-coated por-.

tions or areas are to be caused to adhere when the blanks are folded to box form.

lVith the above objects in view, theinvention consists in the construction and combination of parts substantially as hereinafter described and claimed. 7

()f the accompanying drawings:

Figure 1 is a plan view of one of my improved gluers, it being understood that when in use there are usually two of the gluers, side by side, to similarly apply glue to the opposite marginal portions of passing blanks.

Figure 2 is a side elevation of the same, omitting the usual removable side wall of the glue box, andwith a portion of the wheel or disk and a portion of the scraper broken out.

Figure 3 is a plan of a blank of the specific shape operated upon by the particular wheel or disk illustrated by Figures 1 and 2.

Similar reference characters designate similar parts or features in all of the views.

Referring to Figures 1 and 2, a box or receptacle of the usual type, for the glue, is illustrated at 20, having lugs 21 by means of which it may be adjustably supported by transverse rods or shafts of the box-folding machine of which the gluer illustrated is to form a part.

Mounted in a suitable bearing 22 is a shaft 23 to which the roll or disk 24 is secured, the lower portion of the disk being immersed in glue in the box 20. In practice, as is usual in the gluing mechanism of box-folding machines, the shaft 23 carries another similar disk in a glue box at the other side of the machine.

A scraper 25, having a bevelled edge 26 bearing on the periphery of the disk, is secured to a shaft 27 mounted in a bearing at the side of the box, said shaft having an arm 28. A spring-29 between the end of said arm and a lug 30 projecting from the side of the box, serves to cause the bevelled tip edge of the scraper to bear yieldingly on the periphery of the glue disk. A screw 31 mounted in a lug 32 projecting from the box, under the arm 28. serves to limit the lowest position to which the scraper can be pressed by the spring 29. The object of the structure just described is to enable the scraper to be so adjusted that it will keep the upper portion of the smooth periphery of the disk sufiiciently clear of glue to prevent the transmission of glue therefrom onto a passing blank, the screw also preventing the scraper from so bearing on the disk as to unduly wear the disk or the acute edge of the scraper.

As clearly illustrated by Figures land 2, the entire periphery of the disk is smooth except two groups of small recesses 33, 34, hereinafter referred to as pockets. The object and utility of said pockets will presently be described in connection with Figure 3.

The disk is rotated in the direction of the arrow 06, Figure 2, while blanks are fed over the disk in the direction of the arrow y, as by the usual carrying belts not necessary to illustrate, the blanks being caused to contact with the glue disk by any suitable means such as a roll indicated at 35. Owing to the clearing of the smooth portions of the'periphery of the disk by the scraper 25, the only glue that will be taken up by the passing blanks will be some of that which is in the pockets 33, 34, and the quantity of glue so taken is so slight that the blank carries away only the amount of glue necessary to effect adhesion of theportions that require it for the completely folded box, without carrying any excess of glue liable to be squeezed beyond the adhesively joined portions.

As illustrated, the two groups of pockets differ in shape, one being rectangular but slightly tapering and the other being triangular. This is because'a disk such as illustrated is designed to apply glue to one of the margins of the particularblank illustrated,by Figure 3. Of course a complete machine for gluing and folding blanks such as illustrated by Figure 3 (said Figure 3 being on a scale slightly smaller than the scale of the other figures) has two of the gluing devices to simultaneously apply similar groups of glue spots to both margins of the blanks such as illustrated by Figure 3.

i As explained more fully in my concurrently filed application Serial No. 396,448, when such a blank as illustrated by Figure 3 is folded to box form, the tapering flaps e of the wall section b are inside of those portions of the two wall sections d to which the glue spots 7:. have been applied; therefore the 1 groups 71. are preferably tapered to correspond with the shapes of the flaps 6, said shape being controlled by the shape of the group of pockets 33 in each glue wheel. Also when the illustrated blank is folded to box form, the triangular flaps g of the wall section I) are inside of those areas of the wall sections at to which the glue spots indicated at i have been applied, and the triangular flaps f are folded around the outside corners and onto the outer surface of the wall section b at the opposite ends of the latter; therefore the group 34 of glue pockets is shaped to correspond with the shape of the flap g and also will be substituted in the folding machine for that now illustrated, the groups of glue pockets being of such shapes and dimensions and spacing as to correspond with the particular blanks to be operated upon.

I do not limit myself to any specific number of groups of glue pockets formed in the disk or disks. Some forms of blanks may require to have glue applied thereto in a greater or lesser number of locations than the blank illustrated by Figure 3;-therefore each glue disk may have but a single group of pockets, or may have three or more groups.

\Vhether the disk is provided with a single group of pockets or a plurality of them the spots are so separated from each other and are of such small sizes that when the portions of the blanks carrying the spots are pressed against other portions to complete the folding the blanks to box form, there can be no such excess of glue as to enable the pressure to cause exudation of lue beyond the limits of the overlapped parts. This is true whether the groups of pockets in the disks and the resulting groups of spots of glue on the blanks are in specially designed shapes or not. From the above description given in connection with Figure 3 however, it will be understood that it is usually preferable that the groups of pockets in the. periphery of the disks shall substantially correspond with the shapes of the portions of the blanks which are to receive glue.

Having now described my invention, I claim The combination with a glue receptacle, of a rotary disk mounted to dip in glue in said receptacle, said disk having a smooth periphery provided with two groups of pockets differing from each other in shape and adapted to correspond with the shapes of particular areas of blanks to be operated upon, and a scraper extending the full width of the periphery of said disk.

In testimony whereof I have aflixed my signature.

HAROLD J. GOSS. 

